In this paper, BaSnO3 microtubes were prepared via electrospinning method using Ba(NO3)(2) and SnCl4 center dot 5H(2)O as raw materials. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS), respectively; the gas sensing properties of the as-prepared sample were also investigated. The results revealed that BaSnO3 microtubes could be obtained by calcining the precursor at 700 degrees C for 6 h. It was revealed that the sensor device based on BaSnO3 microtubes (700 degrees C, 6 h) exhibited excellent selectivity and high response toward acetic acid vapor at the operating temperature of 245 degrees C, the ratio of S-1000 ppm acetic acid to S-1000 ppm ethanol was about 14.4; especially, when the concentration of acetic acid was as low as 0.3 ppm, the response was still able to reach 1.4.